Thai Chicken Slaw Burgers
1 tablespoon Worcestershire sauce 1 teaspoon white sugar 2 cloves garlic, minced 2 cups coleslaw mix 2 pounds boneless, skinless chicken breast, o… 2 tablespoons butter 2 tablespoons honey 2 tablespoons olive oil 2 tablespoons tomato paste 3 tablespoons lemon juice 3 tablespoons sweet pickle relish 3 tablespoons Thai sweet chili sauce, or more… 8 hamburger buns, split ½ onion, chopped